Because the senate was one vote short
A primary source would be a film review.
If you would like to know about somebody thinks about a certain movie, then the best way to obtian knowledge on this would be to read his film review which he or she had posted before.
D - both had the objective of conquering Jerusalem.
All the crusades that started out in Europe in those times were created with the main idea an mission of invading and conquering Jerusalem and reclaim the holy city back into the hands of christian warriors.